GBA was incorporated as a dredging engineering and hydrographic surveying firm in 1975. GBA offers a wide range of dredging engineering and hydrographic surveying services including, single beam, multi-beam, side-scan sonar, and beach profile surveys. GBA's experience as engineers and surveyors in the maritime industry sets us apart from competitors because our hands-on experience lends itself to producing quality work products that integrate seamlessly into a Client's plan. We have a solid understanding of big picture dredging and port operations and apply this knowledge to daily surveying activities. GBA's professional staff, comprised of professional engineers, surveyors, and hydrographers offers Clients work products of the highest caliber in a timely manner and at competitive rates.